Antifriction-bearing.



E. S. WOODS, DECD.

A. G. WELCH, EXECUTOR.

ANHFRICTION BEARING.

.APPLICATION FILED APR.12, 1913. Q I 1,13,99L Patented Jan. 30,1917.

2 SHEETS-SHEET l.

E. s. wooos. own.

i A. G. \IELCH. EXECUTOR.

I ANTIFRICTION BEARING.

APPLICATION FlLiD APR.12.1913.

Patented Jan. 30, 1917.

2 SHEETS-SHEET 2= Ell) STATES PATENT @FFTQE.

EDWIN S. WOODS, OF CHICAGO, ILLINOIS; ALBERT G. WELCH, EX'ECUTOR OF SAID EDWIN S. VV'OOIDS, DECEASED, ASSIGNOR TO ALBERT G. WELCH, TRUSTEE.

ANTIFRICTION-BEARING.

antifriction bearings designed to transmit load between two parts capable of limited relative movement and is shown herein as applied to a side-bearing more particularly intended for use in connection with railroad cars.

The invention consists of the matters hereinafter described and more particularly pointed out-in the appended claims.

The improved antifriction bearing is of that type in which the antifriction element is carried by the lower one of the two parts between which the bearing transmits load,

that is to say, in the case of a railroad car in which the antifriction bearing is carried by the truck-bolster.

in the drawings: Figure l is a view representing a longitudinal central section through my improved antifriction bearing. Fig. 2 isa top plan view of the same. Fig.

is a view representing a transverse section through the bearing in a plane indicated by the line 3-3 of Fig. 1. Fig. 4: is a view representing a longitudinal central section through a modified form of the improved bearing. Fig. 5 is a top plan view of the construction shown in Fig. i. Fig. 6 is a view representing a transverse section through the construction shown in Fig. i in a plane indicated by the line 66 thereof.

Referring now to that embodiment of my invention shown in the drawings, and par- ;icularly to that shown in Figs. 1 to 3, inclusive, 10 indicates a casing made integral with and extending transversely of a truck-bolster 11 which may be in the form of channel er other suitable beam construction. The casing 10 is of cblong, reccross-section and has end Patented Jan. 3(1 1931 '7.

Application filed April 12, 1913. Serial No. 760,632.

walls 12, 12 and upright side Walls 13, 13, which rise from the top of the truck-bolster. The top member 11 of the beam forming the truck-bolster, that is to say, that part of said top member .inclosed by the four upright walls of the casing comprises the bottom wall of said casing.

14 indicates a rocker of substantially the length of the casing and placed therein so as to be capable of a rocking movement on the bottom wall 11 of the casing, said rocker is of substantially the width of the space between the side walls 13, '13 of the casing which ooact with it inguiding relation to maintain the rocker in proper position during its rocking movement and when it is at rest. As shown herein, the rocker is recessed on its upper side to provide a longitudinally extending chamber 15 having side walls 16, 16, a bottom wall 17, and curved end walls 18, 18. In this chamber is con tained the antiiriction elements which, as

illustrated herein, consist of a cylindric roller 19 having fiat ends 20. Said roller is preferably providedwith apertures or openings 21 to lighten its weight.

In the bottom wall of the chamber in the rocker is placed a wear-plate of hardened metal, 22, which is of sufficient length to ofi'er a bearing for-the antifriction element throughout the full length of its travel in either direction from the center of the rocker. plate is inclined upwardly toward each end of the rocker from a transverse median line 23. The end walls 18 of the chamber formed by the recess in the upper side of the rocker, are curved to fit the curved surface of the antifriction element when it has reached the endof its possible movement in said chamber. The side walls 16, 16 of the chamber, lyingclosely adjacent to the flat ends of the-antifriction element, as shown in Fig. 3, actto guide said antifriction element in its rolling movement and maintain it with its axis of rotation at right angles to the direction or its travel on the rocker.

The rocker A is provided with means which co-acts with means in the casing to maintain it in its proper longitudinal position in the casing, both when at rest and in its rocking movement. is to say The upper surface of said wearrib engages. As will presently appear the maximum rocking movement of the rocker means which prevents the rocker from .displacement toward one or the other end of the'casing. As'shown in Figs. 1 to 3, this means consists of a transverse wedge-shaped rib located on'the middle of the bottom surface of the rocker, and of a transverse groove or opening 26 in the bottom wall of the casing with the side walls .of which said will not lift this rib entirely from the groove or opening in which it engages, so that apparently the rocker will be maintained in its relative longitudinal, position in the casing.

On each side of the rib 25 the bottom of the rocker'is formed with transverse flat faces 27, 27 which are in a plane at right angles to' a vertical diameter of the antifriction element, when said antifriction element is in a central or other predetermined normal position of rest on the rocker. Beyond said flat surfaces 27, 27, thebottom of the "rocker has upwardly inclined flat sur faces28, 28, said upwardly inclinedflatsur:

faces meeting the first named horizontal fiat surfaces in transverse line of intersection 29 located at redetermined equal distancesat either si e of the median linejof the rocker. Manifestly when the rocker is tipped toward one end ofthe'casing or the other. end'of the casing it will rock upon oneor the other transverse ridges defined by'the lines 29 inwhich the. several surfaces referred to meet.

The operation of the bearing lows {When the body-bolster, indicated at 30, engages the antifriction element and rolls it, vby reason of the relativev movement between the body and truck-bolsters,

toward one end of the rocker, as soon as the antifriction element passes toward the end of thecasingto a point -beyond a point, a vertically above one of the fulcrum ridges v 29, the rockerf14 will be rockedon said ridge so as to bring the associated face 28 into I flat bearing against the bottom wall of the casing, as indicated in dotted lines in Fig. 1. .As soon as the. antifriction element is released, the opposite end of the rocker, by reason of its Weight will cause the rocker to rock on the ridge 29 back into its normal position with the central flat bearing surfaces 27,- 27 in fiat engagement with the bottom wall of the casing, as shown in full lines. 'The antifriction' element will then roll down theincline of the wear-plate toward the central or normal position on the rocker. It will be noted in this connection that the inclined wear faces of the wearplate are made paralleLto the inclined bottom faces 28 of the rocker, so that the 'antifriction element will roll on a horizontal surface, that is to say, one'parallel to the bottom face of the body bolster, when the rocker has been rocked into the position indicated in dotted lines. a

While I have referred to the bearing, surfaces 27 and 28 of the rocker as flat, it will -be understood that I mean by said term,

thatthe said surfaces are substantially flat only, since the surface of the rocker intermediate the transverse ends of said fiat surfaces may be cutaway as indicated at 31, to lighten the construction of the rocker. The bottom wall of the casing, that is to say, the top member of the truck-bolster at the casing, is provided with slots or openings 32 to permit the ci'nders, dust and the like that may collect in the bearing to fall through and thus be discharged from the casing. The rocker 'is provided with inclined ventilation openings 33 for a like purpose and preferably the end and'side walls of the casing are provided with ventilation openings 34. I

-In Figs. 4' to 6, inclusive, I have shown a slightlymodified form on construction, in-

.which like parts are indicated by the same. numerals, of reference; In this case, I provide a casing separate fromthe truck- 'bolster, the same consisting ofa shell 35 ofv suitable cross-section and having laterally extending ears '36 at its base for attachment to the top of the truck-bolster.

'Said' casing has side walls 36, 36, and-end "walls 37, 37, as before, but in this'case the endywalls are carried above the level of V p -'the ends of the rocker and are provided is as fol-' with horizontal, overh'angin flanges 38, 38,

which act 'to loosely con ne the rocker withinthe casing and. prevent it from bouncing out under the vibratory movement,

in connection with the bearing shown-in Figs. 1 to 3. p

While in describing my invention I have referred to certain details of mechanical arrangement and construction, it is tobe understood that the invention is in no way limited thereby except as'pointed out in the appended claims.

' I claim as my inventionz- 1. An antlfr ction bearlng comprlslng a rocker having a top bearing surface, a support for said rocker and an antifriction element carried by said rocker having a peripheral rolling bearing on said top hearing surface, said rocker having upwardly turned ends which limit the movement of said antifriction element, said upturned ends having ventilation apertures, which open into said bearingsurface and extend through said rocker. V

2. An antifriction bearing comprising a rocker having oppositely inclined top bearing surfaces, intersecting in a transverse median line of therocker, a support for said rocker, and an antifriction element having rolling bearing on said oppositely inclined top bearing surfaces ofsaid rocker, said bearing surfaces terminating at their outer ends in upwardly curved turned stop surfaces, adapted to be engaged by and to stop said antifriction element when at either limit of movement on said bearing surface.

3. An antifrictionbearing comprising a rocker provided with a Hat bearing surface at its middle and with oppositely inclined bearing surfaces, which terminate at their outer ends in upwardly turned stop surfaces, a support for said rocker, and an antifriction element having peripheral bearing on said bearing surfaces carried by said rocker and adapted to engage with and be arrested by said upwardly turned stop surfaces at either limit of its travel on said bearing surfaces.

4. An antifriction bearing comprising a rocker provided with a flat bearing surface on its bottom at the middle, and with inclined bearing surfaces at either end of said first named bearing surface, said rocker being provided on its top surface with oppositely inclined bearing surfaces parallel to the inclined bearing'surfaces on the bottom thereof, said oppositely inclined top bearing surfaces being curved upwardly at their outer ends, a support for said rocker, and an antifriction element carried on the top of said rocker.

5. An antifriction bearing comprising a rocker having oppositely inclined bottom bearing surfaces, and an intermediate horizontal bearing surface, said rocker having on its top oppositely inclined bearing surfaces which curve upwardly at their outer ends, said surfaces intersecting in a transverse median line of the said intermediate bottom bearing surface, an antifriction element adapted for a rolling movement on said top bearing surfaces, and a support for said bottom bearing surfaces of said rocker.

6. An antifriction bearing comprising a rocker having oppositely inclined bottom bearing surfaces and an intermediate hori-' zontal bearing surface, said rocker also hav ing oppositely inclined top bearing surfaces which curve upwardly at their outer ends, said surfaces intersecting in a transverse line located about a transverse median line rocker adapted to engage within one of said apertures to prevent undue shifting of said rocker relative to said support.

8. An antifriction bearing comprising a rocker having a top bearing surface, the outer ends of which are curved upwardly to form end walls, and flanges at each side of said bearing surface, a cylindric antifriction element having fiat ends carried by said rockers with its fiat ends in guiding relation with said flanges, said antifriction element engaging either upward curved end wall I when in either limit of its movement, a support for said rocker, said support having apertures and a lug on said rocker adapted to engage in one of said apertures to prevent undue shifting of the rocker relative to said support.

9. An antifriction bearing comprising a casing, a rocker in said casing, means confining said rocker to a predetermined longitudinal position in said casing, said rocker being provided with a topbearing surface and with longitudinally extending upright flanges at each side thereof, and with up wardly curved end walls, and a roller having fiat ends, said roller having rolling bear ing on the top of said rocker with its fiat ends in guiding relation with said upright flanges of the rocker, said curved end walls forming stops to limit the rolling movement of said roller, and said rocker being con structed to tip in either direction when the roller passes a predetermined point .on the rocker in rolling in that direction and to re turn to normal position when said roller is released from load.

10. An antifriction bearing comprising a casing, a rocker in said casing, an antifriction element having rolling bearing on top of said rocker, and means confining said rocker to a predetermined longitudinal position in said casing, said casing being provided with overhanging flanges at its ends adapted to loosely confine said rocker.

11. A. side bearing for railway cars, comprising a rolling loadsupporting antifriction member, and a rolling member carried by the lower bolster and forming a bearing surface for said antifriction member and thereby receiving the load carried by said member.

lli

having a bearing surface vfor cooperation With the load carrying surface -0f sald antifrictlon member.

In testimony, that I claim the foregoing as 15 my invention I afiix my. signature in the presence of two witnesses, this 7th day of April A. D." 1913.

EDWIN S. WOODS. Witnesses:

GEORGE R. WILKINs, KARL W. DOLL. 

